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Finding the Fourth Proportional to 30,169.71, 45,325.71 and 28,491.30

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Solution

The fourth proportional to 30,169.71, 45,325.71 and 28,491.30 is: 42,804.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,169.71 : 45,325.71 = 28,491.30 : x
  2. Step 2: Convert to fraction form
    30,169.71/45,325.71 = 28,491.30/x
  3. Step 3: Cross multiply
    30,169.71x = 45,325.71 × 28,491.30
  4. Step 4: Simplify right side
    30,169.71x = 1,291,388,401.32
  5. Step 5: Solve for x
    x = 1,291,388,401.32/30,169.71
  6. Step 6: Final answer
    x = 42,804.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.